Locations: You can catch a Metapod in Viridian Forest in Blue/Red and Yellow, or look for it on Route 24 and 25 (Red/Blue only). But your best bet is to evolve it from a Caterpie at level 7.

This Pokémon naturally learns the following techniques:

LV 01 - Harden

Tips: And you thought Caterpie was worthless... Metapod believes in the whole non-violence ideology and exercises its right to be a pacifist pod. All it can do is "Harden" its shell. That's it. Don't catch a wild Metapod (if "wild" is the right word here...). Instead, evolve a Caterpie into a Metapod and you'll at least have something to do while you're getting hammered by your opponent.

Like all Bug types, Metapod hates Fire, Poison, Rock and Flying attacks (and Pokemon), but it won't stand a chance against any other attackers, either. What a waste of powerpoints...